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      12-31-2012, 04:48 PM   #5
benzy89
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Drives: '08 E90 335i
Join Date: Jan 2012
Location: Northern NJ

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2008 BMW 335i  [3.75]
Gintani also has quad resonated X-Pipe, but in 100% honesty the stock X-Pipe w/ the Test Pipes is gonna be the quietest X setup. Chances are to quiet it down, you're gonna have to go to a less aggressive muffler section.


Challenge X-Pipe is also really popular, you can get it with sport cats & resonators which will also quiet it down, but you'll lose some power since you won't be fully catless.